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F. W. OSTROM.

POWER TRANSMITTER. No. 366,604. Patented July 12, 1887.

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FREELAND \V. OSTROM, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE IVHEELER & VILSON MANUFACTURING COMPANY, OF SAME PLACE.

POWER-TRANSMITTER.

SPECIFICATION forming part of Letters Patent. No. 366,504, dated July 12, 1887.

Application filed DccemberQT, 1886. ScrialNo. 222,615. (No modcLl To aZZ whom, it may concern: denotes oil-cups for the bearings of the Be it known that I, FREELAND 1V. OSTROM, shaft, which are closed by screw-caps 6.

a citizen of the United States, residing at 7 denotes a lever pivoted to the bracket 1. Bridgeport,in the county of Fairfield and State as at 8. 9 is a spring recessed into said 5 of Connecticut, haveinvented certain new and l bracket, the outer end of which bears against useful Improvements in Power-Transmitters; the upper arm of the lever to throw the parts and I do hereby declare the following to bea out of operative position, as in Fig. 2. full, clear, and exact description of the inven- 10 denotes the shaft, and 11 the driven disk tion, such as will enable others skilled in the or fly-wheel, of a machineas, for example, a 10 art to which it appertains to make and use the sewing-machine -to which power is to be ap- Same. plied. The lower arm of the lever is provided My invention relates to that class of powerwith a brake, 12, consisting, ordinarily, of a transmitters which is used in connection with block of wood lying in a recess in said lever, acontinuously-rotating shafttotransmit power and adjusted by a set-screw, 13. The device 15 to single machinesas, for example, sewingmay be operated in any suitable manner, pret machineswhich it is not desired to keep conerably by a treadle, as shown in Fig. 1. tinuously in operation, but'to which power 14. is a rod extending from the end of the must be transmitted from the main shaft in lower arm of the lever and connected to an such a manner that the machine can be quickly arm, 15, upon the treadle-shaft.

2o stopped or started, the transmission of power 16 is a power-shaft which is continually in being under the complete control of the op motion, and is provided with any number of erator. driving-wheels, 17, a belt, 18, connecting each My invention has for its general objects to driving-wheel with the belt-pulley 4 of the simplify the construction and greatly improve corresponding transmitter. 25 the operation of this class of devices. In manufacturing establishments where In order that others may understand and steam or other motive power is used, a numuse my invention, I will proceed to describe her of machines are usually placed on a long the same in connection with the accompany table, all of which are run from a single shaft, ing drawings, forming part of this speeificaa transmitter being used in connection with 0 tion, which illustrate a simple and commonlyeach machine. In practice I have found it a used arrangement, numbers being used to invaluable improvement to bring the driving dicate the several parts. and driven disks in contact by a spring yield- Figure 1 is an elevation illustrating a maning pressure instead of by a pressure yieldner in which my invention may be applied to ing only to the movement of the treadle. asewing-machine. Fig.2isan elevation upon In order to accomplish this result, I proan enlarged scale, the table being in section, vide shalt 2 with a longitudinal recess, 19. showing the position of the parts when the 20 is a plunger in this recess, having a shoultransmitter is not in use; and Fig. 3 is a 1011- der, 21; and 22 isa springbearing against said i. 'gitudinal section of the transmitter, partially shoulder, the action of which is to force said 40 in elevation, showing the details of construcplunger outward, as shown in Fig. 2. The tion, and showing the manner in which the outer end of the plunger projects a slight Ms power is transmitted to a machine. tance beyond the end of the shaft, and is en- 1 denotes the frame-work or bracket of the gaged and forced inward by the upper arm of transmitter, in which shaft 2 is journaled. the lever when it is desired to transmit power 45 3 is a frictiondisk, Etlldl a belt pulley, both to the machine.

rigidly secured to shaft 2. The friction-disk The manner in which power is applied is and belt-pulley are so adjusted upon this shaft clearly illustrated in Figs. 1 and 3, it being as to permit a certain amount of longitudinal simply necessary to actuate the lever 7 in the motion of the shaft, fora purpose present] y to proper dircction in the construction shown 50 be explained. by pressing the foot upon the treadlewhich IOO the operator is removed from or reverses the treadle, sp iing 9 acts to force the upper arm of the lever to the position shown in Fig. 2, thus removing the pressure by which disk 3 is held in contact wit-h the fly-wheel, .and also throwing the brake against the periphery of the fly-whe'el, so that the machine is almost instantaneously stopped.

By the application of a spring yielding pressure to disk 3 I am enabled to secure a positive variable speed. It is of course well understood that a certain pressure of disk 3 against the fly-wheel 11 will produce the paper, and other fibrous materials.

greatest speed which the main shaft is capable of imparting to a machine when the transmitter is not connected to the shaft of the machine by a positive clutch, and that excess of pressure will reduce the speed of the machine, owing to the friction of the end of hub against the contiguous bearing, and if extreme pressure is applied the friction will completely arrest the motion of the machiner Various materials have been usedas washers between disk 3 and the fly-wheel, such as leather, felt, In the present instance a leather washer in the form ofa piece ofround belting is laid in a groove in the driven disk or fly-wheel, and is engaged by the driving-disk, as shown in Figs. 2 and 3. It will of course be understood that this arrangement may be inverted and the leather applied to the driving-disk, the function of V the leather, in combination with the spring 22,

being the same in either case. This washer is used to deaden the sound which might be produced from the engagement of two metal surfaces, and being a fibrous material it renders the disks less liable to slip when placed in engagement. The use of these washers, however, gives little, if any,yieldingpressure, and very slight movement of the treadle or other actuating mechanism either forcibly engages or entirely separates the disk and the fly-wheel, thus rendering it difficult to apply the necessary amount of pressure to give to the machine its greatest amount of speed or to regulate the speed.

By the use of spring 22 and plunger 20, or any construction which gives a spring yielding pressure of disk 3 against the fiy-wheel, Iam enabled to retain control of the speed and avoid a pressn re so great that the friction produced through resistingbearings will retard the speed of the machine. In order that an adjustment at any desired speed may be retained, I have provided an adjusting-screw, 23, having a check-nut, 24, in the upperarm' of lever 7. This screw is so arranged that the inner end comes in contact with bracket 1 at the instant lever T is in position to impart to disk 3 and the fly-wheel,through spring 22 and plunger 20, the necessary pressure to produce the desired speed. When adjusting-screw 23 is set in the proper position, it is locked there by the check-nut 24.

I claim I l. The combination, with the driven disk or wheel, of a longitudinally movable powershaft, a rigid disk mounted thereon and driven 7 5 thereby, a spring and lever whereby said friction-disk is thrown into operative position, said spring being interposed between the lever and movable shaft, whereby a yielding frictional contact is insured between the-driven and driving disks, and a relatively-soft material-such asleather-interposed between the said parts, which engage by friction, and adapted to co-operate with the spring.

2. The movableshaft carrying afriction-put ley and having a longitudinal recess, in combination with a plunger within said recess, a spring in'the recess bearing against the shaft in one direction and against the plunger in the other, and a lever adapted to bear against the plunger, whereby through said spring the driving and driven wheels may be brought together with a-yielding pressure.

3. The movable shafthaving a friction disk and a longitudinal recess, a plunger in said recess, and a spring in the recess interposed between the movable' shaft and the plunger, in combination with a lever adapted to bear against the plunger and compress the spring,

and a second spring, 9, bearing against the lever-to return it to its. normalposition.

4. The combination, with the fly-wheel of a machine and a power-shaft, of a shaft, 2, having longitudinal movement and carrying a friction-disk, an operating-lever, 7, a spring and plunger between said lever and the shaft, and a set-screw in said lever, whereby its inward movement is stopped at the point necessary to secure any desired speed.

In testimony whereof I affix my signature in I I0 presence of two witnesses. V

FREELAND W. OSTROM.

Witnesses:

A. O. SHATTUOK, AUGUST W. BRUOK. 

